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Old 02-09-2005, 03:35 PM   #24 (permalink)
fckm
Insane
 
Location: Ithaca, New York
http://en.wikipedia.org/wiki/Black_body

Eventhough it's called a black-body, most macroscopic objects can be considered blackbodies and high temperature objects even more so. The idea is that light radiated from an object (as opposed to reflecting off an object) is related to it's thermal energy. An object is 'black' only at zero degress. At any finite temperature, it emits a spectrum of light that is dependant on the temperature.
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